package com.warm.base.algorithm.structure.linkedlist;


import com.warm.base.algorithm.structure.array.Stack;

/**
 * @Date: 2019/12/2 16:01
 * @Author: LChuang
 * @Description:
 */
public class LinkedStack<E> implements Stack<E> {

    private LinkedList<E> list;

    public LinkedStack(){
        list = new LinkedList<>();
    }

    @Override
    public int getSize() {
        return list.getSize();
    }

    @Override
    public boolean isEmpty() {
        return list.isEmpty();
    }

    @Override
    public void push(E e) {
        list.addFirst(e);
    }

    @Override
    public E pop() {
        return list.removeFirst();
    }

    @Override
    public E peek() {
        return list.getFirst();
    }

    @Override
    public String toString(){
        StringBuilder res = new StringBuilder();
        res.append("Stack: top ");
        res.append(list);
        return res.toString();
    }
}
